Preheating your air fryer for 3–5 minutes matters for frozen, breaded and short-cook foods and for baking; for roasts, casseroles and leftovers you can skip it and add 2–3 minutes. Here’s the quick list of when it helps and when it doesn’t.
Some recipes say “preheat to 400°F,” others skip it completely. So, does preheating your air fryer actually matter? Short answer: sometimes a lot, sometimes not at all. Here’s how to know which.
Why preheating can help
When food goes into a cold air fryer, the first few minutes are spent heating the machine, not cooking the food. That means:
- Breaded and frozen foods soak up a bit of moisture before they start crisping.
- Steaks and chops brown less before the inside overcooks.
- Recipe times become less predictable.
Preheating for a few minutes fixes all three.
Read next: Air Fryer Cooking Times by Wattage
When you SHOULD preheat
| Food | Why |
|---|---|
| Frozen fries, nuggets, fish sticks | Crispier outside, more even cooking |
| Breaded foods (chicken tenders, fish) | Crust sets fast instead of going soggy |
| Steaks, chops, burgers | Better browning before the inside overcooks |
| Baked goods (muffins, cookies, biscuits) | Predictable rise and bake |
| Short cooks under 10 minutes | Preheat time would be a big chunk of the cook |
When you can SKIP it
| Food | Why |
|---|---|
| Roasts and big cuts (turkey breast, ham) | Long cook; a few minutes don’t matter |
| Reheating leftovers | It’s already cooked |
| Vegetables tossed in oil | They crisp fine either way |
| Casseroles in a dish | Heat comes up with the dish |
If you skip preheating on a recipe that assumes it, just add 2–3 minutes and check with a thermometer.
How long to preheat
- Basket air fryers: 3–5 minutes at the cooking temperature.
- Oven-style air fryers: 5–8 minutes.
- Has a preheat button? Use it; it’s tuned for that model.
The one preheating rule you can’t break
Never preheat with an empty liner, parchment or foil inside. With nothing holding it down, the fan can blow it into the heating element. Add liners only with food on top. More on liners here.
“Looks crispy, but it’s still raw inside”
Preheating helps with browning, but it can’t tell you if chicken is cooked through. Only a thermometer can. Safe internal temperatures: chicken 165°F (74°C), ground meat 160°F (71°C), steaks, chops and fish 145°F (63°C).
Keep handy: our air fryer cooking times chart — times assume a preheated air fryer for foods under 20 minutes.
FAQ
How long should I preheat an air fryer?
About 3–5 minutes at the cooking temperature for most basket air fryers. Larger oven-style air fryers may need 5–8 minutes. If your model has a preheat button, use it.
Do I need to preheat for frozen food?
It helps. Frozen fries, nuggets and fish sticks crisp better and cook more evenly when they hit a hot basket. Without preheating, add 2–3 minutes.
Is it bad to preheat an empty air fryer?
No, preheating empty is fine — that's what most manufacturers describe. Just never preheat with an empty liner, parchment or foil inside.
Sources
We check temperatures and safety advice against these official sources. Spotted something wrong? Email [email protected].
